Partners' Capital and Distributions - Distributions (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended		9 Months Ended
	Nov. 14, 2024	Aug. 14, 2024	May 15, 2024	Feb. 14, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Partners Capital and Distribution
Distributions					$ 399	$ 336	$ 1,168	$ 982
Cash Distribution | Common Units
Partners Capital and Distribution
Distributions		$ 223	$ 223	$ 223
Distribution per common unit (usd per unit)		$ 0.3175	$ 0.3175	$ 0.3175
Forecast | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions	$ 223
Distribution per common unit (usd per unit)	$ 0.3175
Public | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions		$ 149	$ 149	$ 149
Public | Forecast | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions	$ 149
AAP | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions		$ 74	$ 74	$ 74
AAP | Forecast | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions	$ 74